Master of Science I (Agrochemicals and Pest Management)
Examination: Oct Nov 2016 Semester II (New CBCS)
SLR No. Day
Date Time Subject Name Paper
No. Seat No.
SLR SP
11
Saturday
19/11/2016
10:30 AM
to
01:00 PM
Analytical Techniques for
Agrochemicals
C
VI
Instructions: All questions are compulsory.
Answer any three questions from section II to III.
Figures to right indicate full marks.
Neat and labeled diagram should be drawn.
Total Marks:70
Section-I
Q.1 Choose the most correct alternative and write the sentences. 14
The locating agent of amino acids
Diazo reagent ninhydrin spray
Amphoteric oxides Neutral oxides
Solvent extraction is more good if repeated extractions are done using.
Large solvent Small solvent
Extra Solvent None
The hottest flame in O2 is produced by
Acetylene Cyanogen
Butane Hydrogen
The good oxidants to excite metals in flame is
O2 N2O
both a and b H2
The elements used as an ionization suppressor is
Bi Cs
Na Mg
The most widely used flame in atomic absorption is
Air acetylene Air propane
Air coal gen Oxyacetylene
The function of nebulizer burner system is to
Convert test solution to gaseous atom solution
Produce mist or aerosol of these test
both a and b
Convert liquid to solid state
The technique for back ground correction include.
Deuterium arc Zeeman effect
Smith-Hieftje system All of above
Molar rotation is given by
10) In gas absorption the solubility of gas in a given solvent decreases with

Temperature Concentration
Partial pressure Lowering the temperature
Page 1 of 2
11) The measurement of optical rotation as a function of wavelength is known
As
CD ORD
Cotton effect Octant rule
12) If specific rotation is multiplied by molecular weight of optically active
compound and divided by 100 we get.
Molar rotation Molar rotator power
Both a and b None
13) All the single electron system emit.
Doublet Singlet
Triplet Quartet
14) The region of greatest importance for emission analysis is
200 to 300 nm 200 to 500 nm
250 to 400 nm 400 to 600 nm
Selection- II
Q.2 Explain the detectors of column chromatography. 07
Discuss the applications of conductivity measurement in the analysis of
salinity and soil moisture.
07
Q.3 Discuss the application of polarimetry in the analysis of optical active
pesticides.
07
Give an account of methallochromic indicators. 07
Q.4 What is principle of nephlometry? Give its applications. 07
How accurately can the pH of unknown solution be measured and write their
application in pesticide residues.
07
Selection- III
Q.5 Write a note on chemical interferences prevented in atomic absorption
spectroscopy experiments?
05
What are the factors affecting intensity of emitted radiation in flame emission
spectroscopy?
05
What is the difference between nephlometry and turbidometry? 04
Q.6 Explain different types of acid-base titration. 05
What are the applications in the analysis of soil, water in atomic absorption
spectroscopy?
05
What is specific and molecular rotation? 04
Q.7 Write a note on following:
1. Applications of TLC 05
2. Applications of conductivity measurement in analysis of salinity 05
3. Gravimetric estimation of 04